Switching on/off

Press the button.
See also:
Lane Change Warning System monitors vehicles following behind
Inattentiveness or misjudgement of the distance and speed of a vehicle
approaching from behind can lead the driver into a critical situation when
changing lanes. The optional Lane Change Warning S ...
ConnectedDrive or BMW Assist
...
Convertible: rollover protection system
The rollover protection system is activated automatically in the event of an
accident, a critical driving situation, an extreme tilt in the car's longitudinal
axis or upon loss of ground conta ...
